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Haystack is a novel personal information management system whose goal is to provide an intuitive interface to a user's documents. This thesis describes the author's eeorts to advance the system in several directions. First, we analyze the problem of metadata representation and present a data model based on a directed graph structure. The data model is(More)
Haystack is a novel personal information management system whose goal is to provide an intuitive interface to a user's documents. This thesis describes the author's eeorts to advance the system in several directions. First, we analyze the problem of metadata representation and present a data model based on a directed graph structure. The data model is(More)
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